21103021313232 has 160 divisors (see below), whose sum is σ = 57868699809024. Its totient is φ = 6603861196800.

The previous prime is 21103021313201. The next prime is 21103021313291. The reversal of 21103021313232 is 23231312030112.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 564822232 + ... + 564859592.

Almost surely, 2^{21103021313232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21103021313232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28934349904512).

21103021313232 is an abundant number, since it is smaller than the sum of its proper divisors (36765678495792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21103021313232 is a wasteful number, since it uses less digits than its factorization.

21103021313232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39117 (or 39111 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21103021313232 its reverse (23231312030112), we get a palindrome (44334333343344).

The spelling of 21103021313232 in words is "twenty-one trillion, one hundred three billion, twenty-one million, three hundred thirteen thousand, two hundred thirty-two".